ULVH431G-AE2-R Datasheet, PDF (1/6 Pages) Unisonic Technologies – LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD
ULVH431
Preliminary
LINEAR INTEGRATED CIRCUIT
LOW-VOLTAGE ADJUSTABLE
PRECISION SHUNT
REGULATOR
 DESCRIPTION
The UTC ULVH431 is a low-voltage 3-terminal programmable
shunt regulator with guaranteed thermal stability over full applicable
industrial and commercial temperature ranges.
The output voltage of UTC ULVH431 can be set to any value
between V_REF (1.24V) and the corresponding maximum cathode
voltage (18V) with two external resistors. The device operates from
a lower voltage (1.24V) than the widely used TL431 and TL1431
shunt-regulator references.
The UTC ULVH431 is an ideal voltage reference in isolated
feedback circuits for 3-V to 3.3-V switching-mode power supplies
when it is used with an opto-coupler. It has a typical output
impedance of 0.25Ω. Active output circuitry supplies a very sharp
turn-on characteristic, which makes the UTC ULVH431 very good
substitute for low-voltage Zener diode in many applications such as
adjustable power supplies and on-board regulation.
 FEATURES
* Adjustable output voltage, V_O=V_REF to 18 V
* Low-Voltage operation: V_REF= 1.24 V
* Wide operating cathode current range: 100µA to 50mA
* Reference voltage tolerances at 25°C
* 0.25-Ω typical output impedance
* -40°C ~ 125°C specifications
 ORDERING INFORMATION
Ordering Number
ULVH431G-AE2-R
ULVH431G-AE3-R
Package
SOT-23-3
SOT-23
Pin Assignment
1
2
3
K
R
A
K
R
A
Packing
Tape Reel
Tape Reel
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